| 摘要 |
PROBLEM TO BE SOLVED: To suppress a size of a multicast tree when a plurality of reception devices exist.SOLUTION: In a construction method of a multicast tree, a plurality of network sub-nets 20 including at least one reception device 40 which receives data are arranged, and at least one network sub-net 20 includes a distribution device 30 which distributes data. At least one network sub-net 20 is controlled by an application layer connected to a transmission device 10 that transmits data. The distribution device 30 or the transmission device 10 is automatically connected to the distribution device 30 or the reception device 40 of the network sub-net 20 which can be connected. |
